Figure 2-11 Segregation of Wastes

Note 1: Waste that may be harmful to human health and the living environment or is explosive, toxic, or infectious Note 2: Cinders, sludge, waste oil, waste alkali, waste plastics, waste paper, waste wood, waste fiber, animal offal and plant waste, solid animal waste, waste rubber, scrap metal, waste glass, waste concrete and ceramic, slag, debris, animal excreta, carcasses, soot and dust, any other items that are processed to dispose of the above 19 types of industrial waste, and imported waste

Note 3: Waste that may be harmful to human health and the living environment or is explosive, toxic, or infectious

Source: Ministry of the Environment

ing facilities, animal feed manufacturing facilities and methane recovery facilities. Out of the wastes brought into intermediate processing facilities, 4.59 million tons of wastes are reclaimed after processing, and when added to wastes directly recycled and collected by groups, the total amount of recycled wastes accounts for 10.22 million tons. The recycling ratio compared to the total of processed wastes increased from 5.3% in fiscal 1990 to 19.5% in fiscal 2006.

With regard to the amount of intermediate processing, wastes directly incinerated account for 38.07 million tons (a direct incineration ratio of 77.7% of the whole of processing), and the reduced amount of wastes in intermediate processing, mainly by incineration, accounts for 35.05 million tons (equivalent to 71.5% of all processing). Recently incineration facilities have added electric power generators and heat supply facilities and the efficient use of heat is increasing in many places.

Meanwhile, the total amount of the wastes directly disposed of, incineration waste (such as soot and incinerated ash) and disposal waste from intermediate processing facilities equals the amount sent for landfill in final disposal sites. The amount of the wastes directly disposed of is almost 1.2 million tons, which equals 2.5% of the amount of total emissions. When the incineration and disposal waste are included, the total amount of final disposal is 6.81 million tons, and the amount of all categories is increasing year on year.

### C. Status of municipal wastes disposal - night soil

The population using flush toilets in fiscal 2006 was 114.58 million, with 83.74 million connected to the public sewage systems, and 30.83 million using septic tanks for sewage (13.65 million septic tank users had a combined septic tank for kitchen and toilet waste). 13.21 million did not use the public sewage system of whom 12.98 million made use of planned collection systems and 220,000 used private

Figure 2-12 Proportion of Wastes Generated by Daily Life-related Wastes and Business-related Wastes (fiscal year 2006)

Note: Volume of group collection was classified into domestic waste.

Source: Ministry of the Environment

processing.

The amount of night soil and individual wastewater treatment facility sludge (the planned collection system) generated by about 40 percent of the total population (the total of non-public sewage system and septic tank systems) accounts for 25.95 million kiloliters, and is decreasing yearly. The major content is water; however, the value is huge when simply compared to the amount of regular wastes. By counting one kiloliter as one ton 23.95 million kiloliters of night soil and individual wastewater treatment facility sludge are being processed at human-waste treatment plants, 20,000 kiloliters in composting facilities and methane recovery facilities, 1.44 million kiloliters by discharge into sewage systems, 50,000 kiloliters used on farmland, 390,000 kiloliters by discharge into the ocean and 110,000 kiloliters in other ways.